Engagement ring stolen at Oakland In-N-Out just before tourist was about to propose

A Google Street View image shows the In-N-Out, near the Oakland Coliseum, where a Michigan couple's engagement ring was stolen on Monday, Mrach 27, 2018. A sign posted in the parking lot warns drivers not to leave valuables in their vehicles.

A Google Street View image shows the In-N-Out, near the Oakland Coliseum, where a Michigan couple's engagement ring was stolen on Monday, Mrach 27, 2018. A sign posted in the parking lot warns drivers not to

A Google Street View image shows the In-N-Out, near the Oakland Coliseum, where a Michigan couple's engagement ring was stolen on Monday, Mrach 27, 2018. A sign posted in the parking lot warns drivers not to leave valuables in their vehicles.

A Google Street View image shows the In-N-Out, near the Oakland Coliseum, where a Michigan couple's engagement ring was stolen on Monday, Mrach 27, 2018. A sign posted in the parking lot warns drivers not to

Engagement ring stolen at Oakland In-N-Out just before tourist was about to propose

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Teuta Kokona did not know her boyfriend of eight years, Jurgen Basho, planned to propose on their dream trip to San Francisco this week.

Kokona discovered her partner's plans just one hour into their visit. She did not find the engagement ring – a 1.3-carat oval diamond stunner – in Basho's luggage because someone else found it first. A thief smashed their car rental's window and pilfered the bag that held the ring.

The couple, from St. Clair Shores, Mich., landed at Oakland International Airport on Monday morning. Their first stop was In-N-Out.

"Obviously I wanted to try In-N-Out for the first time," Kokona told KTVU.

While waiting in line to order, near the Oakland Coliseum off Interstate 880, Basho watched the break-in happen before his eyes. A man busted their rental car's window, reached an arm into vehicle and pulled out a backpack. Then he moved on to the next vehicle.

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A Michigan couple said a 1.3 carat, oval diamond engagement ring was stolen from their rental car within in an hour of landing in Oakland on Monday morning. Cristina Rendon reports.

Media: KTVU

Inside the stolen backpack was the ring, which Basho planned to present to his girlfriend on the Golden Gate Bridge later in the week.

After the couple called 911, an Oakland police officer arrived at the scene and told them to file an online report. A sign posted outside the restaurant warns drivers not to leave "valuables visible" in their vehicles.